苯基荧光酮分光光度法测定聚烯烃树脂中的钛

应用苯基荧光酮 -聚乙烯醇 -Tween -80显色体系测定了聚烯烃树脂中的钛 ,建立了测定聚烯烃树脂中钛离子的灵敏、快速的分析方法。考察了测定条件 ,在测定过程中 ,以抗坏血酸还原作用消除了Fe3+ 、V5+ 等干扰。配合物最大吸收波长为 5 3 5nm ,其表观摩尔吸光系数ε =1 0× 10 5L/ (mol·cm) ,线性范围为 0～ 0 12 μg/ml。合成试样回收率为 97 3 %～ 10 1% ,相对标准偏差不大于 1 63 % ;加标回收率为 99 95 %～ 10 1 3 % ,该方法选择性高 ,准确性好 ,简便易行

Determination of Ti in Polyene Resins by Benzfluorenone Spectrophotometry

The Ti 4+ in polyene resin was determined by the benzfluorenone polyethylene alcohol-Tween 80 color development system. Ascorbic acid was used as reducer to eliminate the effect of Fe 3+ ,V 5+ during the course of determination. The condition of determination was examined and the result showed that conjugate compound accorded with Beer rule at the maximum adsorption wavelength of 535 nm,the apparent molar adsorption coefficient was 1 0×10 5 L/(mol·cm) and the linear range was 0～0 12 μg/ml.The recovery rate of synthetic sample was 97 3%～101 1% whose relative standard deviation was less than 1 63% and the recovery rate of synthetic sample containing normal sample ranged from 99 95% to 101 1%,by this method which had the characteristic of high selectivity,accuracy and facility.